eca41af012
Dsymutil, an utility used on macOS when externally linking executables, does not support base address selector entries in debug_ranges. CL 73271 worked around this problem by removing base address selectors and emitting CU-relative relocations for each list entry. This commit, as an optimization, reintroduces the base address selectors and changes the linker to remove them again, but only when it knows that it will have to invoke the external linker on macOS. Compilecmp comparing master with a branch that has scope tracking always enabled: completed 15 of 15, estimated time remaining 0s (eta 2:43PM) name old time/op new time/op delta Template 272ms ± 8% 257ms ± 5% -5.33% (p=0.000 n=15+14) Unicode 124ms ± 7% 122ms ± 5% ~ (p=0.210 n=14+14) GoTypes 873ms ± 3% 870ms ± 5% ~ (p=0.856 n=15+13) Compiler 4.49s ± 2% 4.49s ± 5% ~ (p=0.982 n=14+14) SSA 11.8s ± 4% 11.8s ± 3% ~ (p=0.653 n=15+15) Flate 163ms ± 6% 164ms ± 9% ~ (p=0.914 n=14+15) GoParser 203ms ± 6% 202ms ±10% ~ (p=0.571 n=14+14) Reflect 547ms ± 7% 542ms ± 4% ~ (p=0.914 n=15+14) Tar 244ms ± 7% 237ms ± 3% -2.80% (p=0.002 n=14+13) XML 289ms ± 6% 289ms ± 5% ~ (p=0.839 n=14+14) [Geo mean] 537ms 531ms -1.10% name old user-time/op new user-time/op delta Template 360ms ± 4% 341ms ± 7% -5.16% (p=0.000 n=14+14) Unicode 189ms ±11% 190ms ± 8% ~ (p=0.844 n=15+15) GoTypes 1.13s ± 4% 1.14s ± 7% ~ (p=0.582 n=15+14) Compiler 5.34s ± 2% 5.40s ± 4% +1.19% (p=0.036 n=11+13) SSA 14.7s ± 2% 14.7s ± 3% ~ (p=0.602 n=15+15) Flate 211ms ± 7% 214ms ± 8% ~ (p=0.252 n=14+14) GoParser 267ms ±12% 266ms ± 2% ~ (p=0.837 n=15+11) Reflect 706ms ± 4% 701ms ± 3% ~ (p=0.213 n=14+12) Tar 331ms ± 9% 320ms ± 5% -3.30% (p=0.025 n=15+14) XML 378ms ± 4% 373ms ± 6% ~ (p=0.253 n=14+15) [Geo mean] 704ms 700ms -0.58% name old alloc/op new alloc/op delta Template 38.0MB ± 0% 38.4MB ± 0% +1.12% (p=0.000 n=15+15) Unicode 28.8MB ± 0% 28.8MB ± 0% +0.17% (p=0.000 n=15+15) GoTypes 112MB ± 0% 114MB ± 0% +1.47% (p=0.000 n=15+15) Compiler 465MB ± 0% 473MB ± 0% +1.71% (p=0.000 n=15+15) SSA 1.48GB ± 0% 1.53GB ± 0% +3.07% (p=0.000 n=15+15) Flate 24.3MB ± 0% 24.7MB ± 0% +1.67% (p=0.000 n=15+15) GoParser 30.7MB ± 0% 31.0MB ± 0% +1.15% (p=0.000 n=12+15) Reflect 76.3MB ± 0% 77.1MB ± 0% +0.97% (p=0.000 n=15+15) Tar 39.2MB ± 0% 39.6MB ± 0% +0.91% (p=0.000 n=15+15) XML 41.5MB ± 0% 42.0MB ± 0% +1.29% (p=0.000 n=15+15) [Geo mean] 77.5MB 78.6MB +1.35% name old allocs/op new allocs/op delta Template 385k ± 0% 387k ± 0% +0.51% (p=0.000 n=15+15) Unicode 342k ± 0% 343k ± 0% +0.10% (p=0.000 n=14+15) GoTypes 1.19M ± 0% 1.19M ± 0% +0.62% (p=0.000 n=15+15) Compiler 4.51M ± 0% 4.54M ± 0% +0.50% (p=0.000 n=14+15) SSA 12.2M ± 0% 12.4M ± 0% +1.12% (p=0.000 n=14+15) Flate 234k ± 0% 236k ± 0% +0.60% (p=0.000 n=15+15) GoParser 318k ± 0% 320k ± 0% +0.60% (p=0.000 n=15+15) Reflect 974k ± 0% 977k ± 0% +0.27% (p=0.000 n=15+15) Tar 395k ± 0% 397k ± 0% +0.37% (p=0.000 n=14+15) XML 404k ± 0% 407k ± 0% +0.53% (p=0.000 n=15+15) [Geo mean] 794k 798k +0.52% name old text-bytes new text-bytes delta HelloSize 680kB ± 0% 680kB ± 0% ~ (all equal) name old data-bytes new data-bytes delta HelloSize 9.62kB ± 0% 9.62kB ± 0% ~ (all equal) name old bss-bytes new bss-bytes delta HelloSize 125kB ± 0% 125kB ± 0% ~ (all equal) name old exe-bytes new exe-bytes delta HelloSize 1.11MB ± 0% 1.13MB ± 0% +1.85% (p=0.000 n=15+15) Change-Id: I61c98ba0340cb798034b2bb55e3ab3a58ac1cf23 Reviewed-on: https://go-review.googlesource.com/98075 Reviewed-by: Heschi Kreinick <heschi@google.com> |
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README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
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